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I. Preface
An HDMI video switching controller was made this afternoon. By simulating the signal of the original infrared controller, the network control is realized. However, it is based on the button interface in the early stage, and the response is relatively slow. Next, the ZigBee communication interface is directly connected to the microcontroller, and there is no need to go through the intermediate level of the transfer process. Simplifying the complexity of infrared remote control systems.
2. Circuit design
The circuit schematic diagram is designed, and a ZigBee serial port is added on the basis of the original. Adjust the original I/O port. The PCB is laid and the breadboard is available after one minute. The circuit is perfectly made. The following is the welding commissioning.
AD\Test\2024\May\VideoCaptureF8P7.PcbDoc
▲ Figure 1.2.1 Schematic diagram of the circuit
▲ Figure 1.2.2 PCB circuit
Replicate the IR remote signal of an HDMI multi-channel video switcher[3]
3. Software writing
On the basis of the software just designed, the ZigBee serial interface protocol is added. In this way, the infrared control command can be sent directly when receiving the control command sent by Zigbee, which is much more simplified than the previous design. The whole system has also become more responsive. Let's replace the previous module with the controller you just made. It is used for the video switching control module afterwards.
※Summary※
This article documents the simplified production process of the HDMI video switching controller. Compared to the version made in the afternoon, it receives Zigbee wireless commands directly, which can be replicated into multiple modules for more video switcher control.
Resources
[1]
?? ZIGBEE??? HDMI???: https://zhuoqing.blog.csdn.net/article/details/134709392
[2]
HDMI Video Switching IR Interface: https://www.bilibili.com/video/BV1qT421C7jz/?vd_source=018fb56143bdd99e9082b03b2d65a531
[3]
Copy the IR remote signal of the HDMI Multi-Recording Video Switcher: https://zhuoqing.blog.csdn.net/article/details/133918466